There is a second pic that accompanies the first one and it look like this shot might be from 19, not 22. Rumple is wearing the same suit that he’s wearing for 19 when Racy Lacy is out on the town. So, it looks like that might be Lacy, but it’s episode 19.
https://oncepodcast.com/forums/viewtopic.php?f=89&t=3042&start=80
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"He was a lot of things to me" "The only conclusion was love"